UBS O'Connor’s Mattel MAT Stock Holding History

UBS O'Connor’s Portfolio MAT Stock Details MAT Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-355,000	Closed	-$44.4K	–	283
2025 Q3	$44.4K	Hold	355,000	–	–	﹤0.01%	237
2025 Q2	$985K	Buy	+355,000	New	+$6.32M	0.03%	226
2024 Q2	–	Sell	-172,500	Closed	-$62.3K	–	598
2024 Q1	$62.3K	Hold	172,500	–	–	﹤0.01%	435
2023 Q4	$170K	Buy	+172,500	New	+$3.36M	0.01%	401
2023 Q3	–	Sell	-250,000	Closed	-$213K	–	599
2023 Q2	$213K	Buy	+250,000	New	+$4.52M	﹤0.01%	480
2023 Q1	–	Sell	-500,000	Closed	-$38K	–	683
2022 Q4	$38K	Buy	+500,000	New	+$9.07M	﹤0.01%	677
2022 Q1	–	Sell	-200,000	Closed	-$195K	–	1019
2021 Q4	$195K	Buy	+200,000	New	+$4.2M	﹤0.01%	743
2020 Q1	–	Sell	-25,000	Closed	-$1K	–	374
2019 Q4	$1K	Sell	25,000 -17,500	-41%	-$208K	﹤0.01%	316
2019 Q3	$3K	Hold	42,500	–	–	﹤0.01%	306
2019 Q2	$13K	Buy	42,500 +17,500	+70%	+$206K	﹤0.01%	246
2019 Q1	$11K	Hold	25,000	–	–	﹤0.01%	232
2018 Q4	$7K	Hold	25,000	–	–	﹤0.01%	224
2018 Q3	$34K	Buy	+25,000	New	+$400K	﹤0.01%	270

Other funds holding MAT

EIG

EdgePoint Investment Group Toronto, Ontario, Canada $13.2B AUM 32.43% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Ariel Investments Chicago, Illinois $10B AUM 42.59% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

SAM

Southeastern Asset Management Memphis, Tennessee $1.92B AUM 6.41% 1-Year Est. Return

Franklin Resources San Mateo, California $462B AUM 39.16% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

UBS O'Connor's MAT Position: Q4 2025 in Review

UBS O'Connor increased its Mattel (MAT) stake by 3.2% in Q4 2025, buying an estimated $591K and bringing the position to 973,829 shares worth $19.3M. The position accounts for 0.51% of the portfolio, ranked #19.

UBS O'Connor first reported a position in MAT in Q4 2014 and has held it in 27 quarters since. The position peaked at $24.8M in Q1 2015. 441 funds tracked by Wall St. Rank hold MAT as of Q4 2025.

UBS O'Connor held 973,829 shares of Mattel worth $19.3M as of Q4 2025.
UBS O'Connor bought 30,600 Mattel shares in Q4 2025, an estimated $591K.
Mattel made up 0.51% of UBS O'Connor's portfolio in Q4 2025, its #19 holding.
UBS O'Connor first reported a position in Mattel in Q4 2014 and has held it in 27 quarters since.
UBS O'Connor's Mattel position peaked at $24.8M in Q1 2015.
441 funds tracked by Wall St. Rank held Mattel as of Q4 2025.

Based on UBS O'Connor's 13F filing for Q4 2025, filed 13 Feb 2026.